I noticed this at times. It was a wonky sidestand switch. It would run when down, run when up, but die when the stand was somewhere in the middle, so putting it up would cut the power long enough to kill it. It should be off when down but wasn't.

They don't need to warm up that long. Have your gear on and be ready to ride. Give it 30 to 60 seconds to get the oil circulating. Then take off and ride gently for a mile or two. Don't go right out onto the race track. I never leave a bike unattended (meaning not on it) to warm up. It is rare, but I have seen cases where engine vibration rattled the bike off the stand.

Sometimes I let my bike warm up long enough to stop the compression release from rattling. While it was rattling and the compression would drop, the idle speed would drop down to the point that the bike would quit. I'd rather have it quitting on the sidestand or center stand, so I let it warm up an adequate amount of time to avoid quitting at the next red light!My bike didn't vibrate enough to knock itself off any stand. I also let my bikes warm up enough to ensure the oil has filled all the required crooks and nannies. But thanks for the advice. Gee, there must have been something I didn't know in there!Actually, if it's a cool day they don't warm up enough to get rid of all the crap that should burn out of the oil at temps exceeding 180o. The REs are actually quite cold blooded. Built for India, I assume.Bare

Im with Bare on this one. I let the bike warm up for at least 3 or 4 minutes while Im putting the gear then locking up the garage. 30 to 60 seconds just doesnt seem long enough to warm up a cold single. A little longer warm up time cant really hurt anything IMHO.